Process for manufacturing soap powder.



E. C. KAYSER. PROCESS FOR MANUFACTURING SOAP POWDER. APPLICATION FILED NOV. 14, 1912.

1,158,625. Patented Sept. 14, 1915.

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NITED gTAEd AENT @lBlFllQE.

EDWIN CUNO KAYSER, OF BEAU S EJOUR, ISLAND OF JERSEY, ASSIGNOR TO PROCTER AND GAMBLE COMPANY, OF CINCINNATI, OHIO, A CORPORATION O13 OI-IIO.

PROCESS FOR MANUFACTURING SOAP POWDER.

Specification of Letters Patent.

Patented Sept. 14, 1915.

To all whom it may concern:

Be it known that I, EDWIN CUNo KAYSER, a subject of the King of Great Britain, residing at Beau Sejour, St. Brelades lBay, Island of Jersey, have invented a new and useful Process for Manufacturing Soap Powder, of which the following is a specification.

Soap powder has been hitherto produced by mechanical disintegration of coherent masses of dry soap, or by spraying fluid soap into space under adequate conditions. The former method is tedious and. expensive, while the viscous nature of fluid soap hampers direct dispersion. In either case the free carbonate of soda, forming generally a large constituent of the commercial article, has to be bodily incorporated prior to disintegration or dispersiona somewhat difiicult proceeding.

The object of the present invention is to form soap powder of a more regular and even structure than hitherto produced, and in a more convenient, rapid and economical manner. To attain this object, the soap forming constituents, that is, fatty acid and dissolved carbonate of soda, or caustic soda, are made to mingle and react upon one another in the finest available state of division, namely, in the form of spray.

The two kinds of spray may be produced by any known means, but I preferdispersion from a nozzle. Nozzles, fitted with helical or the like devices, will, in a well-known manner, effect dispersion of fluid fatty acid and of carbonate of soda solution irrespective of temperature, as long as the liquids are supplied under adequate pressure, such as may inter alz'a be imparted by a pump. In order to attain spontaneous evaporation of the solvent water and rapid cooling of the newly-formed soap particles, such as will prevent subsequent agglomeration, it is however expedient to operate with soda solution, heated in a closed vessel considerably above the boiling point of water and kept under permanent steam pressure, such conditions-j rendering avallable nozzles, not fitted with special atomizing devices.

The total apparatus required for my purpose may therefore comprise nothing further than a closed vessel, the outlet whereof is furnished with a nozzle, and wherein the soda-solution may be heated and placed under constant steam pressure, and anotherof alkali, may at suitable distance be placed indirect or tangential opposition, or that then orifices may be concentric, the only object being that of effecting an intimate mingling and impingement of the two kinds of spray. It will also be understood that each of the containing vessels mentioned above may be furnished with a plurality of nozzles, that the rate of delivery from either of two cooperating nozzles must be duly proportioned, and that one nozzle, supplying fatty acid, may act in conjunction with two or more nozzles dispersing alkali, or vice versa. Finally it is obvious that, by whatever means the spray mixture is produced, it should be delivered into space in such a ample time and opportunity for reacting, before they subside or are. otherwise arrested.

An illustrative example of'the invention is as follows, it being understood that the process is not restricted to the particular materials or conditions herein specified.

The figure illustrates an apparatus suitable to execute the process.

manner, that the various particles may have ssl To a vessel 1, provided with a steam coil Q 2, is supplied a thousand (1000) pounds of red oil 3 through inlet'5; To a second vessel 6 provided with a steam coil 7 is supplied through inlet 8 twenty-four hundred (2400) pounds of a saturated solution 9 of sodium carbonate and six hundred (600) pounds of caustic soda lye of 30 Baum strength. Both vessels are heated by means of the steam coils to 125 C., the soda solution being under the necessary pressure to produce this temperature. Pressure gages 11 and 12, and thermometers 13 and 14 are suitably attached to the vessels. The heated liquids are now pumped in the ratio of one part of red oil to three parts of the soda solution, through the pipes 15, 16, pumps 17 and 18, andpipes 19, 20, to the atomizing or spraying nozzles 21, 22, j which project into the spraying room or chamber 23, and are so located as to produce a thoroughly mixed spray 24, the reaction taking place between the finely-divided or atomized particles of fatty acid and soda solution, as above de- 2. The process of producing soap powder, 1

which comprises causing spray, of dissolved carbonate of soda or caustic soda, produced by nozzle actlon, to mingle wlth and react upon spray of fluid fatty acid, produced in the same manner, and controlling the conditions to obtain directly, as a reaction product, a powdered soap. 4 I

3. The process 0112 producing soap powder, which comprises causing spray of dissolved carbonate of soda or caustic soda, produced by ejecting from a nozzle solutions heated above the normal boiling point, to mingle with and react upon spray of fluid fatty acid, and controlling the conditions to obtain directly, as a reaction product, a powdered soap.

Witnesses:

H. J. MORRISON, A. E. ANDERSON.

EDWIN CUNO KAYSER. 

